Hot-water heating system.



No. 812,889. PATENTED FEB. 20, 1906. W. J.v SHEETZ.

HOT WATER HEATING SYSTEM. APPLIOATION IILED MAR-.15, 1904.

SHEETSSHEET l.

illvenfoz PATENTED FEB. 20, 1906. W. J. SHEETZ. HOTWATEB. HEATING SYSTEM.

APPLICATION FILED MAR.15, 1904- 3 SHEETSSHEET 2.

gluvawfoz q vitvwoom PATENTED FEB. 20, 1906.

W. J. SHEETZ. HOT WATER HEATING SYSTEM.

APPLICATION FILED MAR.15, 1904.

3 SHEETSSHEET 3.

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WILLIAM J. SHEETZ, OF WASHINGTON DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF, TO HENRYM. BAKER, OF WASHINGTON, DISTRICT OF ooLUMBi HQTNWATER HEM-awe SYSTEM.

To all whom it mag concern Be it knownthat I, WILLIAM J. SHEETZ, a citizen of the United States, residing at Washington, in the District of'Columbia,'ha ve invented certain new and useful Improvements in Hot-Water Heating Systems; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled the art to which it appertains to make and use the same. This invention relates to hot-water heating systems; and it has for its object to provide a simple, durable, and comparatively inexpensive heating system adapted for the use of gas as a fuel, to provide means for automatically supplying cold -water to the boiler to replace waste therefrom, and to automatically reduce or completely out ofl the flow of gas to the burner when the, water becomes unduly heated; and it consists'in the parts and combinations of parts hereinafter described and claimed. V

In the accompanying'drawings, forming a part of this specification, Figure 1 is aside elevation of my improved heating system; Fig. 2, an enlarged vertical section through the casing of the boiler, showing the watertubes in side elevation; Fig. 3, a plan view of the boiler with the dome removed; Fig. 4, an enlarged detail view of the thermostat with one-half of'its casing removed; Fig. 5, a detail side elevation of the valve mechanism for controllin the water-supply to the boiler, and Fig. 6 a etail side elevation of the head or washer for the-thermostat-rod.

Similar letters refer to similar parts through consists ofa casting, preferably circularin o shape, having a series perforations atherethrough for the admission of air to sup ort combustion and also having apeep-ho e b.

p ied with gas by a pi e hic h Within the casting A the burners (indicated.

b dotted lines, Fig. 2) is arranged and is sup-f f 1 d, whiIch leadsitda source 0 supp y, w pipe a so su ies a pi e.- e, which leads to 'a pilot-bu er f. (S own by dotted lines, Fig. 2.)

Suitably sup ortedin an desired manner from the base is a boiler which consists of a series of spirally-arranged coils, preferably five or more, of cold-drawn seamless tub- Specification of Letters Patent.

- Application filed March 15,1904. Serial No. 198,314.

carries a valve k Patented Feb. 20, 1-906.

ing. The tubes are arranged spirally, and the 0011s gradually decrease in diameter toward the top, so as to form truncated cones, and, as shown, Figs. 2 and 3, are arranged'one over the other or in nested form and are staggered,

so.that the second coil" of the series breaks joint with the first or outside coil, the third coil breaking joint with the second coil, the

fourth coil with the third, and the fifth coil;

with thefourth coil; but none of the coils are in contact, so that the products of combustion passing upfrom the burner pursue a tortuous course around and between the convolutions of the different. coils to reach -the stack. At then-lower ends each coil enters the drum or manifold C and terminates or opens in a similar drum or manifold D at-the top,

' the drum D being of asize sufficient to ful close the space at the topof the innermost coil. Surrounding the coils of tube is a firebrick jacket E, preferably made in two parts .andof truncated form, on which rests a metal dome E, to which is connected the smoke-stack F. The jacket E is inclosed by a sheet-metal jacket F and the parts are held in position and together by the rods g, which connect the perforated ears h on the dome and thebase of the boiler.

From the manifold or drum D a pipe G leads to a thermostat H, arranged in the main pipe H, which conducts the hot water tothe radiator I.- The thermostat comprises a short cylinder '1), having an elbow-coupling '1'. at one end for the end of pipe G and a stuff- .ing-box i through which the rod J works.

The end of the rod J which enters the cylinder '1' carries a perforated disk or head 1',

against which a coil-spring K bears, and at.

its other end is provided with a ca or headed nut j. The spring K is made 0 a different metal from the metal of which the cylinder is made, so that their expansive qualities vary in de ee. A coupling 7' is provided at the 'endo the cylinder for connection with thei'inainhot-water-pipe H, and alongitudinallycentrally-divided casing 7' incloses the therniostat, so as to prevent unauthorized medported in bearings or lugs It at one end A seat k is formed in a casing 76* for the valve W, and the pipe L, which leads from the gas-main, is screwed "dling therewith. The headed nut j abuts against a valve-rod k, which movably 'sup-' charge its contents.

into the end of said casing k and the pipe (I connects said casin with the burner c. A light coiled spring 5 surrounds the valverod is and bears at one end against a collar k, secured to the rod is, and at its other end against one of the In s k, so that an lon itudinal movement 0 said rod cause byt e expansion of sprin K is resisted by the sprin and the latter a so serves to return the ro to its normal position when the s rin K contracts. The normal position 0 va ve k is 0 en, so as to permit of a free passage of gas t e'rethrough; but when the water is heated to a degree which will cause expansion of the cylinder Land spring K the nut j forces or moves the rod 7c a ainst the resistance of spring is, and thus W olly closes the valve, so as to cut-off the supply of gas, or reduces the valve-opening, so as to reduce the supply until the water is cooled off and the spring 7c contracts, and thus permits the rod is to bereturned to its normal position, and thus open the valve k and permit a full or increased flow of gas therethrough. At a point between the thermostat and the gas-main the pipe Lis tapped by the pipe e, which feeds the pilot -burner, and both pipes d and e are provided with suitable cut-oi? cocks, as shown.

To the main hotL-water pipe H is connected a short pipe M, which communicates with the valve-chamber m, which is provided with a seat 111/ (see Fig. 5) for a valve m A pipe M leads from valve-chamber m to the sewer or to any.other desired point to dis- & The valve 'm is secured at the end of arod m which passes through a stufiing-box m and enters a valve-chamberN through a stufling-box n and carries on its lower end a valve M, which is adapted to fit the seat, a formed in said chamber N. The rod m is threaded, and a tapped collar 'm is run thereon in order to adjust the tension of the spring- O, arranged on said rod between the collar and the chamber N. The collar m is formed with a series of holes orop'enin s "m, in its circumference in order toprovi e for the application of a spanner-wrench or other tool to adjust the collar on the rod. To one side of the chamber N a pipe P is connected, which connects with the feed-pipe P, which enters the lower manifold or drum 0 through the base of the boiler, while a-pipe P leads from the bottom of the chamber N to the water-main,

From. the main hot-water pipe H a pipe R leads to a closed expansion-chamber R, provided with a petcock R and arranged above the top of the boiler, which chamber is also in communication with the hot-water The expansion-chamber is provide with a valve R.

Sis the return-pipe from ,the radiator I,

which connects with the feed-pipe P and also 6 5 with the waste or discharge pipe M, the latter connection being made by a pipe S", having a cock S In operation the water is admitted to the boiler throu h pipe P and its connections. The water rises in the boiler and enters exansion-chamber B when the boiler is filled.

y opening cock R on the expansion-chamber before turning on the water the water will escape through said cock, thus indicating when boiler is supplied or .filled. The entrance of the water expels the air from boiler into expansion-chamber through pipe R and also through pipe R into said chamber, from which it escapes through valve R".- The boiler being filled the gas is ermitted to enter through pipe L, and the pi ot-burner is ignited, which in turn ignitesburner c. The heated gases pass upwardly from the burner c and coming 1n contact with the coils of tubing heat the water contained therein, which then circulates to the radiator through pipes G and H and-back to the boiler through plpe S. Should steam be generated or the temperature of, the water he made too great, the gas-supply is automatically reduced or cut off entirely by the expansion of s ring K overcoming the resistance of spring K, and thus moving the rod k, so as to close or partly close the valve 70 which controls the gassuppl Should the movement of valve k cut 0 the gas entirely, thus cutting off supply from burner c, the latter will be ignited by the pilot-burner, which is burning at all times, as soon as the water cools down sufiicientl to permit of the spring K contracting, and t us pcermitting spring k to expand and move rod so as to open valve k and permit the flow of gas to pipe d.

In order to prevent the possibility of an explosion and to relieve the boiler of undue pressure in the event of steam forming therein, I provide the automatic safety device shown in Fig. 5 and which also automatically controls the supply of water to the boiler after the system is once started in operation.

In the event of steam formin in the boiler or the water becoming unduly eated'it rises in the expansion-chamber and may escape therefrom through valve R and also from the main hot-water ipe H through valvechamber m, from w ch it escapes to the waste-pipe M. The pressure on valve m 'forces its rod 'm, downwardly, and thus opens valve n and permits a flow of cold water to enter the boiler to replace that escaping through valve m Thus there being no escape of the water from the boiler excepting through valve-chamber m and the valve in the latter controlling the inlet-valve for the cold water and both valves moving in unison it is obvious that the boiler will be automatically kept supplied with water. The

valve R is opened when the boiler is started and kept open until steam issues therefrom, after which it is closed.

It is not intended that water shall reach the top of expansion-chamber when the system is cold. I make no'claim for the peculiar features of the boilerhereinbefore described in this ap.

plication, but reserve; the same for a new application for Letters Patent thereon.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. In a heating system, a boiler, a main hot-Water pipe and a return-pipe connected with said boiler, a feed-pipe, a Waste-pipe, and a steam-operated safety device connecting the main hot-water pipe and the wastepipeand controlling. the supply of cold water to the boiler during its operation.

2. In a heating systema boiler, a feed-pipe, a main hot-water pipe leading to the radiator, a waste-pipe, and a safety device arranged between the feed and waste pipes and I connected to the hot-water pipe, said device 25' comprising two valves adapted to be operated in unison to control the flow of water to the feed-pipe and the flow from the Waste or discharge pipe.

3. In a heating system, a boiler, an expano sion-chamber connected therewith, a main hot-water pipe leading to the radiator, a return-pipe from the radiator to the boiler, a waste-pipe from said hot-Water pipe, a feedpipe, a burner connected with the gas-sup- 35 ply, thermostat arran ed in the hot-Water pipe and-controlling t e flow of gas to the burner, a safety device arran ed between the hot-water pipe and the fee -pipe and controlling the inlet of water to the boiler and 40 the outflow from the hot-water pipe, and a pilot-burner connected to the gas-supply.

In testimony whereof I afiiX my signature in presence of two witnesses.

WILLIAM J. SHEETZ.

Witnesses:

HUGH M. STERLING, DANL. F. HALL. 

